title: Neck metaphyseal angle guidance in proximal femoral varus osteotomy.
abstract: An angle within the femoral arch is defined, and its line is described in selecting the osteotomy site and the position of the fixation device in performing a femoral varus osteotomy. This neck metaphyseal angle was measured with varying degrees of rotation on seven pediatric femurs; it was also studied on 283 randomly selected hip radiographs. The angle varied 25-40 degrees in 90% of the patients and was not age related. The angle is stable within 5 degrees as long as the landmarks, base of the great trochanter, and medial metaphysis of the femoral neck are definable (0-30 degrees of rotation).
authors.affiliation: Department of Neuromuscular and Developmental Disorders, Hospital for Joint Diseases, New York, NY 10003.
authors.forename: A D
authors.initials: AD
authors.lastname: Grant
authors.forename: A
authors.initials: A
authors.lastname: Strongwater
authors.forename: W
authors.initials: W
authors.lastname: Lehman
authors.forename: J
authors.initials: J
authors.lastname: Nelson
authors.forename: D
authors.initials: D
authors.lastname: Atar
mesh_terms: D000293:Adolescent; D000328:Adult; D000886:Anthropometry; D001696:Biomechanical Phenomena; D002648:Child; D002675:Child, Preschool; D005272:Femur Neck / Q000002:abnormalities / Q000000981:diagnostic imaging* / Q000601:surgery; D006801:Humans; D007223:Infant; D008875:Middle Aged; D009984:Orthopedic Fixation Devices; D010027:Osteotomy; D011859:Radiography; D012015:Reference Standards